Step 14.  Tighten the 21mm bolt inside the car to 129 ft-lbs (factory specification) and reinstall the seat cushion.

Step 15.  Back under the car, install the control arm rear-mounting bolt and nut.

Step 16.  To torque the bolts and to check pinion angle the car must be level and with a loaded suspension.  Using a drive-on lift is easiest.  If the lift is not available, use ramps or place the jack stands under the front lower control arms to load the front suspension.  Place the jack stands under the axle tubes in the rear to load the rear suspension.

Step 17. With the suspension loaded, torque the control arm bolts to 129 ft-lbs, as per the factory specification.

Step 18.  Now it is time to check the pinion angle.  This step is different for one and two-piece drive shafts.  Both methods are covered below.  BEFORE STARTING, jounce the car to let the suspension settle.  (Jounce: verb. move up and down repeatedly.)

FACTORY TWO-PIECE DRIVE SHAFT:  Use your magnetic angle finder and attach it to the FRONT drive shaft.  Record the front drive shaft angle.  Next, attach the angle finder to the pinion flange.  Record the angle.  Subtract the pinion flange angle front the front drive shaft angle to get your net pinion angle.

AFTERMARKET ONE PIECE DRIVESHAFT:  Use your magnetic angle finder and attach it to the transmission bell housing at the mounting surface to the engine.  Record your angle.  Then take your recording for the pinion flange.  Subtract the pinion flange angle from the transmission reading to get your net pinion angle.

Step 19.  If necessary, loosen the jamb nuts on the upper control arm and adjust the pinion angle.  Once you are satisfied with the pinion angle, double-check all fasteners and jamb nuts.  Measure pinion angle again, just to be sure.

Test drive the vehicle.  If you notice vibration that was not present before you installed the adjustable upper control arm, recheck your pinion angle.